'According to the source, a manned flight to the moon is possible under a scheme envisaging two coupled launches. First, a lunar take-off and landing complex is placed on a low Earth orbit, and then the upper stage with effective cryogenic propellants is orbited. The third launch orbits a manned spacecraft, and the fourth - another upper stage. After docking of the lunar take-off and landing complex with the manned spacecraft on the lunar orbit, the crew descends to the Moon surface inside the lunar take-off and landing complex, carries out the research program and returns to orbit. After that the spaceship returns to Earth.

'Also, another coupled Angara-A5V launch will be needed before the manned flight to deliver and deploy the first expeditionary unit of the lunar base on the Moon.

'"Thus, Russia’s first full-fledged expedition to the Moon would require six launches of the Angara-A5V rocket," the source said.

'Previously, head of the Energia Rocket and Space Corporation (RKK Energia) Vladimir Solntsev said that the flight to the Moon would require four Angara launches.

'According to the source, the launches are planned to be carried out in pairs from the Vostochny cosmodrome (the Amur region in Russia’s Far East) and the Plesetsk cosmodrome (Archangelsk region in the northwest) with small intervals between the blast-offs. Under the proposed scheme, after the orbit placement, the complex with a total weight up to 70 tonnes will be docked with the manned spacecraft, after which it will fly to the Moon. A payload of 18-20 tonnes will be delivered to the lunar orbit by the end of the mission.'